function load_postcode_widget() {
  if (document.readyState!='loading') {
    // in case the document is already rendered
    inject_postcode_widget();

  } else if (document.addEventListener) {
    // modern browsers
    document.addEventListener('DOMContentLoaded', inject_postcode_widget);

  } else document.attachEvent('onreadystatechange', function(){
    // IE <= 8
    if (document.readyState=='complete') {
      inject_postcode_widget();
    }
  });
}

function inject_postcode_widget() {
  var csrf_token = 'uPB9+K3WwoVAVAhnrPO637v5VpT+CPsCS2h0CQ/yrtflpCLOi1NlYmoTgJdqCz93B6RUSw26VQKdDWXmVlAe5w==';
  var fetch_path = 'https://www.truespeed.com/broadband/addresses';

  var head_tag = document.getElementsByTagName('head')[0];

  head_tag.setAttribute('csrfToken', csrf_token);
  head_tag.setAttribute('fetchPath', fetch_path);
}

setTimeout(load_postcode_widget, 13);